TradingView EMA Crossover Strategy

I need a clean, well-commented Pine Script (v5) that trades on TradingView whenever the 20 EMA crosses the 50 EMA. The core crossover is straightforward; however, entries and exits must respect an additional layer of custom logic that I will outline once work begins, so please structure the code so that section can be expanded easily (for example, a dedicated function or block with clear placeholders). The script must: • Plot both EMAs and colour-code bullish and bearish zones for quick visual checks. • Fire long and short orders on the bar close that confirms the crossover and the custom conditions. • Offer input fields for alert names, order size, stop-loss and take-profit multipliers, plus on/off toggles for longs and shorts. • Generate ready-to-use alert() calls so I can connect the strategy to webhooks without extra editing. Please deliver the final .pinescript file along with a brief note explaining parameter usage and how to import it into a chart. Accuracy, readability and future-proof structure are more important than exotic features; keep it simple, efficient, and fully compatible with the latest TradingView update.

Project ID: 40532183